Genitalfluid or Sexfluid is when someone’s ideal genitals/physical sex varies over time.[1] It can also mean that one's opinion of their genital set or physical sex changes.
History
The term was coined by Tumblr user plurgai on May 20th of 2020.
Flag
The designer of the Genitalfluid flag is plurgai on Tumblr. It was coined on May 20th of 2020. It has no known meaning.
References
https://plurgai.tumblr.com/post/618670888558247936/genitalfluid-when-your-ideal-genitals-vary-at